GiveBest Programmable Space Heater

Im undecided if im keeping these. I ordered a bundle deal 2 for $44.99. this is the 800w wall plug in unit. We have 2 sides to our house that must have been added on in the past and one add side is on a slab and not connected at all yo firnace. theres a floor wall radiator register that does not work. I think it might just be for looks. and the other add on is my bedroom and theres a fireplace that I don't use that pours cold air into my room. we've insulated and covered it now but even still cold days are cold, the 3 vents that go to my room and the one vent in the bathroom trickle, and I mean trickle air flow. this is our first winter here. I've been going crazy trying to keep it comfortable in this bedroom and not blow a breaker or blow my electric bill. so I bought the 450w bundle for my daughter's closet and my bathroom. really seems to do well and thermostat works well too. fan shuts off when its not blowing hot. these 800w on the other hand, first of all the touch screen is not sensitive at all. have to keep tap tap tapping the button. p1 uses 300w and there is no thermostat it just blows warm air constant until I guess it over heats. idk im not letting it get that far. p2 same thing but air is warmer at 850w. Eco mode is the only way to regulate temp by thermostat. even still fan never shuts off. I assume to cool motor but wtf. I believe P2 will warm up a good size room but dang, if you want to set it and forget it, you can forget about that because its going to overheat and auto shut off and your room will be cold by the time you get back anyways. Givebest should have stuck with the design of the 450w. 3 stars because it will warm up a room. not 4 or 5 because its not efficient and the touch screen is annoying to navigate. as a matter of fact as I type I've decided im returning and getting another set of 450w.